Kaku fixes grammar, particles, and keigo in every desktop app, right where you type, and tells you why. When you ask, it also improves rough drafts, changes tone, or translates into natural Japanese.

Have you ever typed a Japanese message… then spent 10 minutes wondering if you just offended someone? 😅 That was me. Learning Japanese isn’t just about grammar. It’s about navigating a culture where the same sentence can sound polite, awkward, or even rude depending on how you say it. The fear of getting it wrong stopped me from practicing more than I’d like to admit. So I built something I wish I had from day one. Kaku doesn’t just correct grammar—it helps you write naturally based on the context and level of politeness, so you can send your message with confidence while learning along the way. If you’ve ever hesitated before hitting Send, Kaku is for you. I’d love for you to try it and tell me what you think! 🇯🇵

Finally, something that explains the grammar fix instead of just silently correcting me. The keigo suggestions in my emails felt surprisingly natural too.

the inline explanations actually teach you the grammar, not just patch the sentence. really thoughtful touch for anyone learning keigo and particles in context.

Finally, something that explains the grammar fix instead of just silently correcting me. The keigo suggestions in my emails felt surprisingly natural too.

the inline explanations actually teach you the grammar, not just patch the sentence. really thoughtful touch for anyone learning keigo and particles in context.

Kaku

Write Japanese with confidence.

Write Japanese with confidence.